Check Low Tire Aftermarket Wheels Tire Pressure Monitor FMVSS 138 - keywords C0750 C0755 C0760 C0765 DIC DTC TPM light operation sensor
| Subject: | Check Low Tire Aftermarket Wheels Tire Pressure Monitor FMVSS 138 |
| Models: | 2007 Cadillac Escalade, ESV, EXT |
| 2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe |
| 2007 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL |
| with (RPO UJ6) |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customer's may bring in their vehicle with a "Check Low Tire "message on the Drivers Information Center
Recommendation/Instructions:
The Tire Pressure Monitor (TPM) system consists of:
| • | Four Sensors, one for each wheel |
| • | Remote Control Door Lock Reciever (RCDLR) |
| • | Instrument Panel Cluster or Driver Information Center Message |
Each sensor sends a unique RF signal to the RCDLR to indicate the tire pressure. The RCDLR receives the signals and coverts them to pressure data. This data is sent to the Driver Information Center on the GM low speed lan network. If any tire is more that 25% below the vehicles recommended tire pressure, the driver will receive notification to "Check Low Tire" either on the Instrument Panel Cluster or the Driver Information Center. This message will stay active until the low tire concern is corrected. This message cannot be disabled due to FMVSS 138. Aftermarket wheels installed without the sensors will activate the "Service Tire Monitor" warning and will stay on until the sensors are installed. Even if the sensors are installed in aftermarket wheels they may not mount in the correct OEM orientation and still turn on the "Service Tire Monitor" message.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
